/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 07:48:29,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 07:48:29,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 07:48:29,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 07:48:29,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 07:48:29,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 07:48:29,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 07:48:29,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 07:48:29,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 07:48:29,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 07:48:29,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 07:48:29,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 07:48:29,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 07:48:29,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 07:48:29,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 07:48:29,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 07:48:29,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 07:48:29,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 07:48:29,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 07:48:29,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 07:48:29,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 07:48:29,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 07:48:29,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 07:48:29,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 07:48:29,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 07:48:29,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 07:48:29,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 07:48:29,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 07:48:29,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 07:48:29,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 07:48:29,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 07:48:29,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 07:48:29,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 07:48:29,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 07:48:29,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 07:48:29,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 07:48:29,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 07:48:29,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 07:48:29,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 07:48:29,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 07:48:29,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 07:48:29,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 07:48:29,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 07:48:29,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 07:48:29,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 07:48:29,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 07:48:29,208 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 07:48:29,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 07:48:29,208 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 07:48:29,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 07:48:29,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 07:48:29,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 07:48:29,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 07:48:29,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 07:48:29,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 07:48:29,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 07:48:29,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 07:48:29,210 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 07:48:29,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 07:48:29,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 07:48:29,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 07:48:29,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 07:48:29,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 07:48:29,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:48:29,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 07:48:29,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 07:48:29,212 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 07:48:29,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 07:48:29,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 07:48:29,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 07:48:29,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 07:48:29,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-09-25 07:48:29,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 07:48:29,701 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 07:48:29,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 07:48:29,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 07:48:29,707 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 07:48:29,709 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-25 07:48:29,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/736d592af/8a31b0a3c08a4cf4aedbef990ff7145f/FLAGb4dd0a294 [2020-09-25 07:48:30,356 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 07:48:30,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-25 07:48:30,370 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/736d592af/8a31b0a3c08a4cf4aedbef990ff7145f/FLAGb4dd0a294 [2020-09-25 07:48:30,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/736d592af/8a31b0a3c08a4cf4aedbef990ff7145f [2020-09-25 07:48:30,642 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 07:48:30,648 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 07:48:30,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 07:48:30,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 07:48:30,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 07:48:30,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:48:30" (1/1) ... [2020-09-25 07:48:30,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5de13521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:30, skipping insertion in model container [2020-09-25 07:48:30,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 07:48:30" (1/1) ... [2020-09-25 07:48:30,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 07:48:30,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 07:48:31,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:48:31,175 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 07:48:31,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 07:48:31,308 INFO L208 MainTranslator]: Completed translation [2020-09-25 07:48:31,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31 WrapperNode [2020-09-25 07:48:31,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 07:48:31,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 07:48:31,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 07:48:31,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 07:48:31,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (1/1) ... [2020-09-25 07:48:31,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (1/1) ... [2020-09-25 07:48:31,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (1/1) ... [2020-09-25 07:48:31,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (1/1) ... [2020-09-25 07:48:31,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (1/1) ... [2020-09-25 07:48:31,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (1/1) ... [2020-09-25 07:48:31,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (1/1) ... [2020-09-25 07:48:31,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 07:48:31,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 07:48:31,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 07:48:31,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 07:48:31,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 07:48:31,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 07:48:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 07:48:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-25 07:48:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-25 07:48:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-25 07:48:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-25 07:48:31,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-25 07:48:31,469 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-25 07:48:31,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 07:48:31,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 07:48:31,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 07:48:31,469 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-25 07:48:31,469 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-25 07:48:31,470 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-25 07:48:31,470 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-25 07:48:31,470 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-25 07:48:31,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-25 07:48:31,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-25 07:48:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-25 07:48:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-25 07:48:31,471 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-25 07:48:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-25 07:48:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-25 07:48:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-25 07:48:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-25 07:48:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-25 07:48:31,472 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-25 07:48:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-25 07:48:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-25 07:48:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-25 07:48:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-25 07:48:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-25 07:48:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-25 07:48:31,473 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-25 07:48:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-25 07:48:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-25 07:48:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-25 07:48:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-25 07:48:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-25 07:48:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-25 07:48:31,474 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-25 07:48:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-25 07:48:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-25 07:48:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-25 07:48:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-25 07:48:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-25 07:48:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-25 07:48:31,475 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-25 07:48:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-25 07:48:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-25 07:48:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-25 07:48:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-25 07:48:31,476 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-25 07:48:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-25 07:48:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-25 07:48:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-25 07:48:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-25 07:48:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-25 07:48:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-25 07:48:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-25 07:48:31,477 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-25 07:48:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-25 07:48:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-25 07:48:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-25 07:48:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-25 07:48:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-25 07:48:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 07:48:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-25 07:48:31,478 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-25 07:48:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-25 07:48:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-25 07:48:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-25 07:48:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-25 07:48:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-25 07:48:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 07:48:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-25 07:48:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-25 07:48:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-25 07:48:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-25 07:48:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-25 07:48:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-25 07:48:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-25 07:48:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-25 07:48:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-25 07:48:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-25 07:48:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-25 07:48:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-25 07:48:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-25 07:48:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-25 07:48:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-25 07:48:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-25 07:48:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-25 07:48:31,482 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-25 07:48:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-25 07:48:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-25 07:48:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-25 07:48:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-25 07:48:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-25 07:48:31,483 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-25 07:48:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-25 07:48:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-25 07:48:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-25 07:48:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-25 07:48:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-25 07:48:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-25 07:48:31,484 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-25 07:48:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-25 07:48:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-25 07:48:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-25 07:48:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-25 07:48:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-25 07:48:31,485 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-25 07:48:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-25 07:48:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-25 07:48:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-25 07:48:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-25 07:48:31,486 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-25 07:48:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-25 07:48:31,487 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-25 07:48:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 07:48:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 07:48:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 07:48:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 07:48:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 07:48:31,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 07:48:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 07:48:31,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 07:48:31,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 07:48:31,843 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-25 07:48:32,027 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 07:48:32,028 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 07:48:32,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:48:32 BoogieIcfgContainer [2020-09-25 07:48:32,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 07:48:32,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 07:48:32,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 07:48:32,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 07:48:32,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 07:48:30" (1/3) ... [2020-09-25 07:48:32,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402491e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:48:32, skipping insertion in model container [2020-09-25 07:48:32,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 07:48:31" (2/3) ... [2020-09-25 07:48:32,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402491e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 07:48:32, skipping insertion in model container [2020-09-25 07:48:32,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 07:48:32" (3/3) ... [2020-09-25 07:48:32,045 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-09-25 07:48:32,056 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 07:48:32,068 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 07:48:32,090 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 07:48:32,122 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 07:48:32,122 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 07:48:32,123 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 07:48:32,123 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 07:48:32,123 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 07:48:32,123 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 07:48:32,123 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 07:48:32,123 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 07:48:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-09-25 07:48:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 07:48:32,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:48:32,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:48:32,160 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:48:32,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:48:32,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1267394549, now seen corresponding path program 1 times [2020-09-25 07:48:32,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:48:32,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051826588] [2020-09-25 07:48:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:48:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:32,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:32,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:32,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:32,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 07:48:32,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 07:48:32,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 649 [2020-09-25 07:48:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:32,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-09-25 07:48:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 07:48:33,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:48:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:33,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:33,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:33,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:48:33,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:33,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 07:48:33,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:33,072 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:33,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:33,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:33,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:48:33,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051826588] [2020-09-25 07:48:33,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:48:33,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 07:48:33,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430399887] [2020-09-25 07:48:33,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 07:48:33,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:48:33,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 07:48:33,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 07:48:33,115 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-09-25 07:48:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:48:33,278 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2020-09-25 07:48:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 07:48:33,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-25 07:48:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:48:33,292 INFO L225 Difference]: With dead ends: 112 [2020-09-25 07:48:33,292 INFO L226 Difference]: Without dead ends: 51 [2020-09-25 07:48:33,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 07:48:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-25 07:48:33,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-25 07:48:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 07:48:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-25 07:48:33,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 26 [2020-09-25 07:48:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:48:33,349 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-25 07:48:33,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 07:48:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-25 07:48:33,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 07:48:33,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:48:33,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:48:33,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 07:48:33,352 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:48:33,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:48:33,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1487998036, now seen corresponding path program 1 times [2020-09-25 07:48:33,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:48:33,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793199075] [2020-09-25 07:48:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:48:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:33,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:33,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:33,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:33,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 07:48:33,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 07:48:33,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-09-25 07:48:33,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:33,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 07:48:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 07:48:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 07:48:33,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:33,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:48:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:33,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:33,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:33,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:48:33,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:33,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:48:33,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:33,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:33,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:33,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:33,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:48:33,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793199075] [2020-09-25 07:48:33,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:48:33,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 07:48:33,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708517488] [2020-09-25 07:48:33,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 07:48:33,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:48:33,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 07:48:33,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 07:48:33,657 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 4 states. [2020-09-25 07:48:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:48:33,789 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-09-25 07:48:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 07:48:33,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-09-25 07:48:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:48:33,791 INFO L225 Difference]: With dead ends: 116 [2020-09-25 07:48:33,792 INFO L226 Difference]: Without dead ends: 78 [2020-09-25 07:48:33,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 07:48:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-25 07:48:33,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-09-25 07:48:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 07:48:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-09-25 07:48:33,803 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 28 [2020-09-25 07:48:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:48:33,804 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-09-25 07:48:33,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 07:48:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-09-25 07:48:33,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 07:48:33,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:48:33,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:48:33,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 07:48:33,806 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:48:33,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:48:33,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1813416041, now seen corresponding path program 1 times [2020-09-25 07:48:33,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:48:33,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140943235] [2020-09-25 07:48:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:48:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:33,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:33,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:33,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 07:48:33,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:33,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-25 07:48:33,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:33,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 07:48:33,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 07:48:33,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 07:48:33,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:33,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 07:48:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 07:48:33,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 07:48:34,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 07:48:34,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 07:48:34,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 07:48:34,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 07:48:34,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 07:48:34,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.8 [2020-09-25 07:48:34,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 07:48:34,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 07:48:34,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 07:48:34,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 07:48:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 07:48:34,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140943235] [2020-09-25 07:48:34,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 07:48:34,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 07:48:34,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528635675] [2020-09-25 07:48:34,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 07:48:34,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 07:48:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 07:48:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 07:48:34,012 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 7 states. [2020-09-25 07:48:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 07:48:34,226 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-09-25 07:48:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 07:48:34,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-25 07:48:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 07:48:34,228 INFO L225 Difference]: With dead ends: 126 [2020-09-25 07:48:34,228 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 07:48:34,229 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-25 07:48:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 07:48:34,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-09-25 07:48:34,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 07:48:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-09-25 07:48:34,239 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 28 [2020-09-25 07:48:34,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 07:48:34,239 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-09-25 07:48:34,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 07:48:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-09-25 07:48:34,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-25 07:48:34,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 07:48:34,241 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 07:48:34,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 07:48:34,242 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 07:48:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 07:48:34,242 INFO L82 PathProgramCache]: Analyzing trace with hash -223654578, now seen corresponding path program 1 times [2020-09-25 07:48:34,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 07:48:34,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730424660] [2020-09-25 07:48:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 07:48:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 07:48:34,270 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 07:48:34,270 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 07:48:34,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 07:48:34,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 07:48:34 BoogieIcfgContainer [2020-09-25 07:48:34,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 07:48:34,299 INFO L168 Benchmark]: Toolchain (without parser) took 3653.98 ms. Allocated memory was 138.4 MB in the beginning and 248.5 MB in the end (delta: 110.1 MB). Free memory was 100.3 MB in the beginning and 194.4 MB in the end (delta: -94.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-09-25 07:48:34,300 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 07:48:34,301 INFO L168 Benchmark]: CACSL2BoogieTranslator took 660.15 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 99.7 MB in the beginning and 168.6 MB in the end (delta: -68.9 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-09-25 07:48:34,302 INFO L168 Benchmark]: Boogie Preprocessor took 71.03 ms. Allocated memory is still 202.4 MB. Free memory was 168.6 MB in the beginning and 165.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-25 07:48:34,303 INFO L168 Benchmark]: RCFGBuilder took 654.50 ms. Allocated memory is still 202.4 MB. Free memory was 165.9 MB in the beginning and 117.7 MB in the end (delta: 48.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. [2020-09-25 07:48:34,304 INFO L168 Benchmark]: TraceAbstraction took 2258.92 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 117.1 MB in the beginning and 194.4 MB in the end (delta: -77.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 07:48:34,307 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 660.15 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 99.7 MB in the beginning and 168.6 MB in the end (delta: -68.9 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 71.03 ms. Allocated memory is still 202.4 MB. Free memory was 168.6 MB in the beginning and 165.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 654.50 ms. Allocated memory is still 202.4 MB. Free memory was 165.9 MB in the beginning and 117.7 MB in the end (delta: 48.2 MB). Peak memory consumption was 48.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2258.92 ms. Allocated memory was 202.4 MB in the beginning and 248.5 MB in the end (delta: 46.1 MB). Free memory was 117.1 MB in the beginning and 194.4 MB in the end (delta: -77.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 562]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List p = a; [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 [L542] EXPR p->h [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 187 SDtfs, 64 SDslu, 206 SDs, 0 SdLazy, 251 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 79 ConstructedInterpolants, 0 QuantifiedInterpolants, 4198 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...